code: def create_kernel_ard(self, num_dims, **kwargs):
      return PeriodicKernel(ard_num_dims=num_dims, **kwargs)
  
file_path: gpytorch/test/kernels/test_periodic_kernel.py
imports: import math
  import unittest
  import torch
  from gpytorch.kernels import PeriodicKernel
  from gpytorch.priors import NormalPrior
  from gpytorch.test.base_kernel_test_case import BaseKernelTestCase
label_desc: Use image node_id 2 for calling the TestPeriodicKernel obj's underlying member method code with example usage: obj.create_kernel_ard(num_dims) and returns: PeriodicKernel